* updated tccpp submodule
 * rather use gl.h and glext.h on linux, instead of gl3.h (apparently neither gl3.h nor glcorearb.h are part of mesa)
 * prepped premake.sh for freebsd support (shell compat)
 * updated README with additional os x info (/Library has to be symlinked to the used sdk if there are frameworks in there that oclraster needs)